When it dies or is exiled, return it to the battlefield tapped.) Whenever this creature attacks, each opponent loses X life and you gain X life, where X is the number of creatures you control with +1/+1 counters on them
(For reference, 2021s infamous Moonbreon peaked at $1,300 in a 10, and is now around $740.) The scarcity will be increased by Paldean Fates being a s0-called special set, meaning booster packs wont be sold individually (unless your LCS tears down boxes)
In this regard, the usual combo of Eternal Soul, Soul Servant, and Dark Magical Circle is a great way of ensuring backline destruction
Especially if it blows up in your face
Obviously a card that does this is going to see some serious competitive play, as demonstrated by teams such as Comic Odyssey
I like Samurott because it reminds me of Victini VMAX - it has a caveat to fulfil the damage bonus of its attack, however, its relatively easy to satisfy and it can do it for a low energy cost